An improved service quality measurement model for soundscape assessment in urban public open spaces

The well-known service quality measurement (SQM) models, Importance-Satisfaction (I-S) model and Improvement index (Ii) model, have been recently proved useful in the analysis of soundscape quality. By combining the concepts of soundscape and quality management, this paper proposes an improved SQM model for soundscape assessment in urban public open spaces. Instead of using the I-S model, the Preference-Satisfaction (P-S) model was developed for soundscape quality evaluation, which can simultaneously assess the importance, satisfaction and improvement direction of soundscape elements and provide more accurate and comprehensive information for guiding the soundscape management and improvement. The proposed methods were subsequently applied to case studies in eight ordinary urban public open spaces in Fujian Province, China, and provided detailed information about the soundscape quality of these surveyed open spaces as well as their improvement strategies. The results have demonstrated the practicality and effectiveness of the proposed method. To the authors' knowledge, practical applications of quality management methods (or its variations) to urban soundscape study are still limited in the literature; therefore, the proposed method and findings of the current study could be valuable for both practical soundscape design and academic research.